Serialize Boolean to "1" and "0" instead of "true" and "false"

Question

I can't find any method on the Boolean class to serialize a Boolean to "1" and "0" instead of "true" and "false".

Is there any native function to do that ? If not, what is the best way (most optimized way) ?

Update: I indeed mean to produce a String out of a Boolean.

Answer 1

If you're talking about producing a String from a given Boolean, then no, there is no built-in method that produces "0" or "1", but you can easily write it:

public static String toNumeralString(final Boolean input) {
  if (input == null) {
    return "null";
  } else {
    return input.booleanValue() ? "1" : "0";
  }
}

Depending on your use case, it might be more appropriate to let it throw a NullPointerException if input is null. If that's the case for you, then you can reduce the method to the second return line alone.